// Copyright 2000-2017 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license that can be found in the LICENSE file.
package qunar.tc.decompiler.modules.decompiler.vars;

public class VarVersionEdge { // FIXME: can be removed?

    public static final int EDGE_GENERAL = 0;
    public static final int EDGE_PHANTOM = 1;

    public final int type;

    public final VarVersionNode source;

    public final VarVersionNode dest;

    private final int hashCode;

    public VarVersionEdge(int type, VarVersionNode source, VarVersionNode dest) {
        this.type = type;
        this.source = source;
        this.dest = dest;
        this.hashCode = source.hashCode() ^ dest.hashCode() + type;
    }

    @Override
    public boolean equals(Object o) {
        if (o == this) return true;
        if (!(o instanceof VarVersionEdge)) return false;

        VarVersionEdge edge = (VarVersionEdge) o;
        return type == edge.type && source == edge.source && dest == edge.dest;
    }

    @Override
    public int hashCode() {
        return hashCode;
    }

    @Override
    public String toString() {
        return source.toString() + " ->" + type + "-> " + dest.toString();
    }
}
